The Sadler's Ultra Challenge is a wheelchair and handcycle race that runs between Fairbanks and Anchorage, Alaska. It is the world's longest wheelchair race. Divisions include Men's Handcycle (with A, B, and C classes), Men's Wheelchair, and Women's Handcycle. The 267 mile (430 km)-long race is run in eight stages and takes six days to complete. The annual competition began in 1984 and occurs in July of each year.